Hoist



' 3. W. KITTREDGE.

HOIST.

AN'LNA'I'IOII FILED DEQ. l5. I9l5.

Patented Oct. 14, 1919.

2 SNEETFSHEET 2- A TTORNEY JOHN W. KITTBEDGE, OF AKRON, OHIO.

HOIST.

Specification of Letters Patent.

Patented Oct. 14. 1919.

Application filed December 15, 1915. Serial No. 66,996.

To all whom it may concern:

Be it known that I, JOHN W. Krrrnnnen, a citizen of the United States,residin at Akron, in the county of Summit and tate of Ohio, haveinvented a new and useful Hoist, of which the following is a full,clear, and exact description.

My invention relates to hoists in which an electric motor operates awinding drum, and is applicable to derricks, cranes, mines, elevatorsand the like.

The objects of my improvements are 1st. To provide a hoist of smallfirst cost,

' size and weight.

2nd. To make it simple, working with few operations on the part of theoperator, thus economizing labor, time and skill.

3rd. To eliminate the wearing parts and thus reduce the friction.

4th. To rovide an automatic sto and prevent accidentally hoisting theloa into the overhead sheave.

I attain these objects by the mechanism shown in the accompanyingdrawings, in which;

Figure 1 is a longitudinal cross-section; Fig. 2 is an end view; Fig. 3is a fra mentary side elevation with the upper ha f in section.

A. 'ven piece carries the same number throughout the several views. Forconvenience of description, parts fastened rigidl together arecross-hatched alike thoug they may be different pieces of metal. In sucha case the whole part, moving as a single piece, is designated by asingle numeral, as 8, and different ends or faces by that numeral withletters as 8*, 8 8 etc.

The machine consists of a base 1, suporting housings with bearings 2 and3 earings 2 and 3 carry the rotating armature of a motor 5, similar infunction to the starter of an ordinary motor but differing in form, andthe rotating armature 5 carries the rotating field 6, and the shaft 6which are entirely similar to the corresponding parts of commercialmotors. The rotatin armature 5 ma rotate in its bearin 2 an 3 and itsperip ery is in the form 0 a drum 5, and winds the hoisting rope 7Electric current is brought to the rotatin armature by the collectingrings 5 and t e brushes 3 held in the sup, ort 3 .-The,,collecting ringsare insulate by the insulator 5.

On its outer end, the rotating armature 5 carries an annular gear 5. Theshaft 6 carries a pinion 8 turning loosely on the shaft. A clutch,hereinafter described, grlps it to the shaft at the will of the 0erator. The pinion 8 has a sleeve 8', an on this sleeve is mounted asecond annular gear 9. Mounted on the shaft 6 and the sleeve 8, are twodisks 10 and 10 carryin the shafts 10 and 10 and on these two s afts aremounted two double gears 11 and 12. The disks 10 and 10 are bolted tothe filler plates 10*" shown dotted in Fig. 2, which binds the disksrigidly together without interfering with the ears. The gears 11 and 12mesh with t e pinion 8 and also with the annular gear 9, forming a setof planetary gears, shown by their respective pitch circles in Fig. 2.The gears 11 and 12 mesh with the annular ear 5. The ratio of 5 to 11 or12 is sligfitly different from the ratio of 9 to 11 or 12 Thus as thegears 11 and 12 are rotated, a slight difference in the speed ofrotation is transmitted to the annular gears 5 and 9.

To illustrate :Suppose the pinion 8 to have 24 teeth; gears 11 and 12 tohave 62 teeth each; gears 11" and 12 to have 21 teeth each; and annulargears 9 and 5 to have 148 and 107 teeth respectively. Supose the annulargear 5 is made stationar or the time being, as by having the ropefastened to a heavy weight 15, and suppose the pinion 8 to revolvecounter clockwise, as indicated by the arrow. The disks 10 and 10revolve in the same direction as the pinion but more slowly, and thedouble gears 11 and 12 move about the central shaft 6 and also turn ontheir own axles 10 and 10. Gear 9 moves slowly clockwise.

Now suppose the annular ar 9 is brought to rest by a brake. e pro erbrake for this purpose is not a part of t is invention and for purposesof this patent ap lication a simp e band brake 13 and pedal 14 areshown. The pinion 8 and gears 11 and 12 rotate almost as before, and theannular gear 5 revolves slowly counter clockwise or in the samedirection as the pinion 8 and raises the weight. With gears as abovedescribed, the pinion 8 running 1150 R. P. M. turns the gear 5 and thedrum 85 R. P. M., and with a itch diameter of 27 ins. for the windingrum, gives a hoisting speed of 600 feet per minute.

15 to drop. Both annular gears 5 aged 'Weig t and 9 now turn nearlytogether and earrythe train.

of gears around with them. It will be noted armature are connected bythe train of gears, they have a definite speed, relation but with thebrake released, there is no mechanieal connection and aneleetriealrelhtion ohlfgi The pinion 8 was said above to be loose onthe"shaft6. It is"cofnl1i1ec tecl to it a done clutch; 16 whichmotes(longitudinally on the shaft 6 but is helglto the 'o'fie i n s thewe f ft fea e y elirtch 16 enga eshfleene which is itiediw th. hep piebed etee i thlt e 1 3 ear ng The o e pri h fif fanon r, g a 5? has s hrrdfi an 1 Le ti a: r 20. The reel}; 20 passes t roljgfhla holein thelever l9 an'd, .as the tlrnnrhoists, the Screw thread 5 inoves raniiQQtoward the lever 19. The rack 20 is itse f threaded and carriesa win1111521 theloa'd flfi reaehed a certain predeterntitieallheiglrt, thenut 21 comes in contact iththe lever 119 v the rack 20 continqes to rnoie, coinpresse f he p i g 18 and -forc sf the @0119 ea h. 9 91 g e ee'pwith ewe-e189. Qirieg dlfie' fim 'i t ge'l th 0f h evexe e t 2 ng uidea the .ieq t the 11 It i it di ei nmment 91 g the shif 6 a t w en melsimm rs whichma j enga'e a eon eave ga e 1Q? in th he; he as g gihg. thi a weaker prmgt e 1, epr te 8, beet ag'ams't p1ece8, en bothleprm gisarefree 5 ett n mes we s 16. rw i h ed ier t he f m e s! rq ffeut o t eah d t i sme d p ereta ng field 6 Lb he ge tr .e mp ing fiisjc m p e dfit dut h dit eage by t lev l-('1 he er i ew -teete'i efie e? am e eeixzeeea. rene iiete agre t me dwe eeet etke g t er it t rq tneshefi 241 eflame a. i @941 wi th we ands th eeer m e etler andis a hraker N .T e a,eeee hem ee tterw ebe t i f eth rbeild eg e e eerie? he k tbrfi thngithf3- t e e keme g tlr he l-2 in th gui e b We set? :5 t ee e ee m m eewtwt p igfflfi? 12 st fie eeee reedt e e t m sem e i hee e z' fwe hqlh llwe e ewe: .4 4 t e mew e the gwen e ght pm it; gnq re .wer the ladeem ei Ehemeeeef r efinin r herr z n fihee eweEe-ee axe et-re enha iteis, nrn19 2- :9; r t ei eek f r nefillm th ve ne mplw qlewe t 1 ha d hrek f t areiqwe h S re r adfi? t ins,- eth dt reqt eae mung melee git"gijsegie'gggesg g1 the lever --19,-"dil li g egs the o rake mid setsthe cone clutch 16 ready to lift another r ibucketfuln 'lhus theoperator lifts the bucket, holds it stationary, lowers it, and eontrolsthe speed of the lowerm by two operatlons, only, the setting andreleasing of V the handbrake 13. This effects a considerable saying oftime and labor over a hoist that lras'the brakeand the connection to thepower in separate mechanisms, controlled by separate levers, or one inwhich it is necesfar: tothrow off the power before shifting to theother. As the f m 0 1 mechan sm the rade inereases from the confieeeiefibu ke refill ei'w flne h buck-e11 can e stopped ata g'reate "heightsimply sew n h W ne" ht d ta all g the re k fitlife threaolbF is an inchpitch and the drum eireninferenee is feet, then moving the wingnnt 21 aninch along the rack 20 changes the height of the stop 7 feet. It will beobserved that the stop is a given distance from the machine, not frondthe point of loading"; The consec iltive buketsfnl can be loadetl attlifierent levels, but under the action of the vi ing nntfll Willstop atthe same level.

The

s ri n 18 is held in lace b a in P g r v a nut in 3: on a threadedportion 20f the shaft 6 Winn it is'n'ecessarytohoi st consecutivelpaglstogijfierent heights thewing hut 23 is fi rfeifbwkilt lldelf ee thp iig 8 operative and the Wing nut 21 is screwed becke tirelr aweytromte e r T Sets; the brake 1U? disconnects from the power; theihandleyer 19, the operator can th en throit on the power and release the .hrelielwa will mad e v r I 11s is a eneral description of my inven- The fl lggn'res for" gears, speeds, etc., are, of course, for illn'etrationonly, as the design adaptable to many speed redrictions Kareem? he cehlee}, b j 3 t we ee ihea e e wew w t d m e nvaeean t Seine. dntt n strotating fielcl, anol to hoist 'When running vin th e qsite d ee e i Jend 91 11 3 mee ceioe are VIY QI I thereof-e A tim e t ng; thus g eserlliecl my invel rtion, I e aip xa-s new d 5 6 5 teec' ie by Le t r emheat; the e 12 P e 1 e eeeme eie *i tithel'te tie th the brake is engagedand the clutch is released and adapted to automatically release themechanism when the clutch is engaged.

2. A drive shaft, a windingdrum, a cable on the said winding drum, aplanetar gear train from the drive shaft to the winding drum, a clutchengaging and releasing a member of the said planetary gear train, afriction brake, a connection from the said friction brake to the drum, aconnection.

from the said friction brake to the clutch, the connection being suchthat the friction brake automatically engages when the clutch releasesand automatically releases when the clutch engages, and frictional'meansmanually control-led adapted to permit, to retard or to stop thebackward rotation of the drum.

3. A drive shaft, a winding drum, a cable on the said winding drum, aplanetar' ear train from the drive shaft to the win ing drum, a clutchin the said planetary gear train, brake control of the said drumautomatically operated, the arrangement being such that the brake setsautomatically when the clutch releases and that the brake releasesautomatically when the clutch engages, and brake control of the saiddrum controlled by the operator.

4. A drive shaft, a winding drum, a cable on the said winding drum, aplanetary gear train from the drive shaft to the winding drum, a brakecontrolled by the operator adapted to permit, to retard or to preventthe backward rotation of the drum, frictional means engaging andreleasing a member of the planetary gear train, and thereby, when theman-operated brake is set, aetuating and releasing the said drum, and abrake operated automatically, the arrangement being such that it engagesautomatically when the said frictional means release the said member ofthe planetary gear train and that it releases automatically when thesaid frictional means engage the said member of the planetary geartrain.

5. A drive shaft, a winding drum, a cable on the said winding drum, aplanetary gear train from the drive shaft to the winding drum, a clutchengaging and releasing a member of the planetary gear train, a brakecontrolled by the operator, a connection from the brake to the drum, thesaid brake adapted to hold or retard the drum against backward rotation,a second brake automatically controlled, a connection from the secondbrake to the drum, a connection from the second brake to the clutch, theconnection being such that the second brake automatically binds the drumagainst backward rotation when the first brake is set and the clutch isreleased and automatically releases the drum when the clutch is engaged,an auto matic stop adapted to disengage the clutch and an adjustment onthe said stop whercb it can be set to disengage the clutch at d1 ferentpredetermined positions of the cable.

6. A drive shaft, a winding drum, a rope or cable on said winding drum,a gear train, said gear train connecting the drive shaft to the windingdrum, a brake, said brake engaging and releasing a member of the geartrain, a clutch, said clutch engaging and releasing another member ofthe gear train, the brake adapted to connect and disconnect the driveshaft from the winding drum when the clutch is engaged, the clutchadapted to connect and disconnect the drive shaft from the winding drumwhen the brake is engaged the brake also adapted to hold or retard thedrum against backward movement when the clutch is released, anotherbrake, said second brake automatically engaging a member of the geartrain when the clutch is released and automatically releasing saidmember of the gear train when the clutch is engaged.

7. A drive shaft, a winding drum, a cable on said winding drum, a gearconnection from the drive shaft to the winding drum, said gearconnection comprised of a set of planetary gears with carrier adapted tocarry the lanet gears around the. central pinion, a hand brake, saidband brake engaging and releasing a member of said gear connection, aclutch, said clutch engaging and releasing another member of said gearconnection, the hand brake adapted to connect and disconnect the driveshaft from the winding drum when the clutch is engaged, the clutchadapted to connect and disconnect the drive shaft from the winding drumwhen the hand brake is engaged, frictional means adapted toautomatically engage one of the said gears with the carrier when theclutch is released and means for automatically releasing the said gearfrom the carrier when the clutch is engaged.

8. A drive shaft, a winding drum, a cable on said winding drum, a geartrain from the drive shaft to the winding drum, a brake retarding andreleasing a member of the gear train, a clutch actuating and releas inganother member of the gear train, the brake adapted to connect anddisconnect the drive shaft from the winding drum when the clutch isengaged, the clutch adapted to connect and disconnect the drive shaftfrom the winding drum when the brake is engaged, the brake also adaptedto hold or retardthe drum against backward movement when the clutch isreleased, a second brake adapted to automatically hold a gear of thetrain against backward movement when the clutch is released and adaptedto automatically release said gear when the clutch is engaged, anautomatic stop adapted to disengage the clutch, and an adjustment onsaid 4= enem stop whereby it can be set to disengage the and releasingone member of said power clutch at. different predeterminedpdsitionstransmissibh, the arrangement being such of the cable; that when itis qa sa, power can be trans- 9. An electric motor corn rised. of an innermitted thi'qugh its member and 'fcannot be so trans- 25 5 and an entermember; trunniens on'said outer when it is released, power member 'andthe said outer member revohimitted, a, elufieh in said powertransmission, ble thereon, bearings and the said trunnions a secondbrake; said seeond brake auto supported therein, a, drive shsft'and thesaid maticeliy engaging a member of the power inner member supportedthereon and rigid transmission when the clutch is released and 10therewith, bearings within the ti'unnions of releasing said member whenthe eiuteh is en- 30 the outer member and, eoneentrie there ga%ed'.with, the said drive shaft ourneied in n testimeny whereof, I havesigned my the said hearings 'in the tnunnions of name tothiss'peeifieation in the pnesenee of the outer member and revelubie'therein, a tw n subscribin' witnesses this llthday of 15 windircighdrum,hthe winding ijirunii5 December, A1915.

afoun t e eri eryo t (5 enter mem ero the mania ir iteg 'aljtherewithsimseheni- JOHN KITTREDGE- cal power ti'ensinissionend the said powerWitnesses: tfensmission eonne-cting the'saiid'drive shaft EDWIN WR eHT,20 to the said winding drum, a brake engaging W H. STOgER.

Washington, D. 6.

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